Wireless Wheel Module Synchronization for TPMS Signal Quality
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Solution Overview
Problem
Tire pressure monitoring systems face challenges in establishing and maintaining effective wireless communications between wheel modules and a central receiver due to difficulties in module localization and synchronization with tire rotation, leading to varying and poor wireless channel characteristics and signal quality.
Innovation Solution
The solution involves determining a transmit angle and time based on the rotation of the wheel, using sensors to sense the edge of the tire footprint and an acceleration sensor to synchronize transmissions when the wheel module is at a favorable position, ensuring consistent and high-quality wireless communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless transmission is performed without synchronization to tire rotation, then the system structure remains simple, but signal quality deteriorates due to varying channel characteristics
Solution Approach 1:
The system performs preliminary actions by detecting the footprint edges and calculating the optimal transmit angle and time before actual data transmission occurs. This advance preparation ensures that transmissions are synchronized with favorable wheel positions, improving signal quality without requiring complex real-time synchronization mechanisms.
Solution Approach 2:
The system uses feedback from footprint edge detection sensors to continuously monitor wheel position and dynamically adjust transmission timing. This feedback loop enables the system to adapt to varying wheel positions and maintain optimal signal quality through data-driven synchronization decisions.
2Reliability
If transmission timing is randomized without coordination to wheel position, then the system operates with lower complexity, but communication reliability worsens due to poor wireless channel characteristics
Solution Approach 1:
The system calculates the optimal transmit time and angle in advance based on detected footprint edge positions and wheel rotation characteristics. This preliminary coordination ensures that transmissions occur at favorable wheel positions without requiring complex real-time coordination mechanisms during actual data exchange.
Solution Approach 2:
The system establishes periodic transmission intervals synchronized with wheel rotation cycles. By coordinating transmissions to occur at regular intervals corresponding to favorable wheel positions, the system improves communication reliability while maintaining manageable system complexity through predictable, rhythmic operation patterns.
3Reliability
If multiple repeated transmissions are performed to ensure data delivery, then communication reliability improves, but energy consumption increases
Solution Approach 1:
The system performs preliminary calculations to determine the single optimal transmission moment based on wheel position and channel conditions. By identifying and executing transmission at this pre-calculated optimal time, the system achieves reliable data delivery in one attempt rather than requiring multiple repeated transmissions, thereby reducing energy consumption.
Solution Approach 2:
The system dynamically changes transmission parameters (timing and angle) based on real-time wheel position data and channel conditions. By adapting these parameters to match optimal transmission conditions, the system maximizes first-attempt delivery success rates, reducing the need for energy-consuming retransmissions while maintaining high reliability.
Data Source
AI summary
Methods of wirelessly communicating are disclosed. In one embodiment, a transmit angle along a circumference of a revolution is determined, a transmit time of the transmit angle based at least in part on a time required to complete a revolution is determined, and a signal is wirelessly transmitted at the transmit angle and the transmit time. Apparatuses and systems are also disclosed.